Free, simple tools for everyday UK money questions
Quick calculators that give you a clear answer in seconds. No sign-up needed, and nothing you enter is stored.
- Free to use
- Built for the UK
- Runs in your browser
Calculators
Overpay your mortgage or save?
Compare the interest you'd save by overpaying with what the same money would earn in savings.
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Credit card daily spend calculator
Turn a card budget into a daily allowance that adjusts as you spend more or less.
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Other tools
Domain name finder
Turn a few keywords into name ideas and see which .co.uk, .uk and .com domains are free.
Coming soon
Why use Useful Tools HQ?
Private by design
Every calculation happens on your device. Nothing you type is saved or sent anywhere.
Made for the UK
Pounds, UK terms and UK rules, like ISAs and the Personal Savings Allowance.
Plain answers
Each tool explains how it works, so you can see where the numbers come from.